Debt (Narrative) (Details) (USD $)	12 Months Ended										3 Months Ended					12 Months Ended
	Jan. 31, 2013	Jan. 31, 2013 Accounts receivable [Member]	Jan. 31, 2013 Inventory [Member]	Jan. 31, 2013 Minimum [Member]	Jan. 31, 2013 Maximum [Member]	Jan. 31, 2013 Maximum [Member] Accounts receivable [Member]	Jan. 31, 2013 Credit Agreement [Member]	Jan. 31, 2013 Amendment No. 5 to the Credit Agreement [Member]	Dec. 22, 2011 Wells Fargo Bank [Member] Revolving Credit Facility [Member] Amendment No. 2 to the Credit Agreement [Member]	Jan. 31, 2013 PNC [Member] Revolving Credit Facility [Member]	Jul. 14, 2012 PNC [Member] Revolving Credit Facility [Member] Amendment No. 1 to the Credit Agreement [Member]	Jul. 27, 2012 PNC [Member] Revolving Credit Facility [Member] Amendment No. 2 to the Credit Agreement [Member]	Jan. 31, 2013 PNC [Member] Revolving Credit Facility [Member] Credit Agreement [Member]	Dec. 22, 2011 PNC [Member] Revolving Credit Facility [Member] Credit Agreement [Member]	Jan. 31, 2013 PNC [Member] Revolving Credit Facility [Member] Amendment No. 5 to the Credit Agreement [Member]	Jan. 31, 2013 Eurodollar [Member] Minimum [Member]	Jan. 31, 2013 Eurodollar [Member] Maximum [Member]	Jan. 31, 2013 Alternate Base Rate Loans [Member] London Interbank Offered Rate LIBOR [Member] Minimum [Member]	Jan. 31, 2013 Alternate Base Rate Loans [Member] London Interbank Offered Rate LIBOR [Member] Maximum [Member]
Line of Credit Facility [Line Items]
Increase in borrowing capacity											$ 3,000,000
Outstanding borrowings									9,800,000
Minimum EBITDA	2,582,000						5,232,000	2,100,000				300,000		1,600,000
Debt Instrumet, Covenant, Maintained Tangible Net Worth	27,020,000
Revolving credit facility	60,000,000			6,000,000	12,000,000
Revolving credit facility borrowing base limitation		85.00%	60.00%			85.00%
Revolving credit facility bears interest range of																1.75%	2.75%	0.75%	1.75%
Remaining borrowing capacity										4,841,000
Minimum tangible net worth covenant													30,748,000		22,865,000
Sub-limit for issuances of letters of credit	3,000,000
Revolving Credit Facility bears interest increased	2.00%
Minimum fixed charge coverage ratio	0.90						1.10
Provision to reduce borrowings under the line	6,000,000
Provision to reduce borrowings under the line, period	60 days
Judgments or judicial actions against the borrowers in excess	$ 250,000